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Explanation / Answer

For NMR there is a n+1 rule, where n = number of hydrogens on adjacent carbon

1)

adjacent to a, b just has one hyrdrogen. so peaks=2 (doublet)

for b,hydrogens on a, c and methyl group at b will act as adjacent hydrogens.so total H=4+2+3=9

total peaks=10

for c, total hydrogens=1(on b)+ 2(on the right carbon)=3

total peaks= 4

2)

following the above scheme,

adjacent hydrogens on a=2(on b)

peaks=3

adjacent H on b=3(a)+ 2(b)= 5

peaks=6

adjacent H on c=2(b)

peaks= 3